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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements.  See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership.  The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License.  You may obtain a copy of the License at
*
*   http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied.  See the License for the
* specific language governing permissions and limitations
* under the License.
*/

import SeriesModel from '../../model/Series';
import Tree from '../../data/Tree';
import {encodeHTML} from '../../util/format';
import Model from '../../model/Model';

export default SeriesModel.extend({

    type: 'series.tree',

    layoutInfo: null,

    // can support the position parameters 'left', 'top','right','bottom', 'width',
    // 'height' in the setOption() with 'merge' mode normal.
    layoutMode: 'box',

    /**
     * Init a tree data structure from data in option series
     * @param  {Object} option  the object used to config echarts view
     * @return {module:echarts/data/List} storage initial data
     */
    getInitialData: function (option) {

        //create an virtual root
        var root = {name: option.name, children: option.data};

        var leaves = option.leaves || {};
        var leavesModel = new Model(leaves, this, this.ecModel);

        var tree = Tree.createTree(root, this, beforeLink);

        function beforeLink(nodeData) {
            nodeData.wrapMethod('getItemModel', function (model, idx) {
                var node = tree.getNodeByDataIndex(idx);
                if (!node.children.length || !node.isExpand) {
                    model.parentModel = leavesModel;
                }
                return model;
            });
        }

        var treeDepth = 0;

        tree.eachNode('preorder', function (node) {
            if (node.depth > treeDepth) {
                treeDepth = node.depth;
            }
        });

        var expandAndCollapse = option.expandAndCollapse;
        var expandTreeDepth = (expandAndCollapse && option.initialTreeDepth >= 0)
            ? option.initialTreeDepth : treeDepth;

        tree.root.eachNode('preorder', function (node) {
            var item = node.hostTree.data.getRawDataItem(node.dataIndex);
            // Add item.collapsed != null, because users can collapse node original in the series.data.
            node.isExpand = (item && item.collapsed != null)
                ? !item.collapsed
                : node.depth <= expandTreeDepth;
        });

        return tree.data;
    },

    /**
     * Make the configuration 'orient' backward compatibly, with 'horizontal = LR', 'vertical = TB'.
     * @returns {string} orient
     */
    getOrient: function () {
        var orient = this.get('orient');
        if (orient === 'horizontal') {
            orient = 'LR';
        }
        else if (orient === 'vertical') {
            orient = 'TB';
        }
        return orient;
    },

    setZoom: function (zoom) {
        this.option.zoom = zoom;
    },

    setCenter: function (center) {
        this.option.center = center;
    },

    /**
     * @override
     * @param {number} dataIndex
     */
    formatTooltip: function (dataIndex) {
        var tree = this.getData().tree;
        var realRoot = tree.root.children[0];
        var node = tree.getNodeByDataIndex(dataIndex);
        var value = node.getValue();
        var name = node.name;
        while (node && (node !== realRoot)) {
            name = node.parentNode.name + '.' + name;
            node = node.parentNode;
        }
        return encodeHTML(name + (
            (isNaN(value) || value == null) ? '' : ' : ' + value
        ));
    },

    defaultOption: {
        zlevel: 0,
        z: 2,
        coordinateSystem: 'view',

        // the position of the whole view
        left: '12%',
        top: '12%',
        right: '12%',
        bottom: '12%',

        // the layout of the tree, two value can be selected, 'orthogonal' or 'radial'
        layout: 'orthogonal',

        // value can be 'polyline'
        edgeShape: 'curve',

        edgeForkPosition: '50%',

        // true | false | 'move' | 'scale', see module:component/helper/RoamController.
        roam: false,

        // Symbol size scale ratio in roam
        nodeScaleRatio: 0.4,

        // Default on center of graph
        center: null,

        zoom: 1,

        // The orient of orthoginal layout, can be setted to 'LR', 'TB', 'RL', 'BT'.
        // and the backward compatibility configuration 'horizontal = LR', 'vertical = TB'.
        orient: 'LR',

        symbol: 'emptyCircle',

        symbolSize: 7,

        expandAndCollapse: true,

        initialTreeDepth: 2,

        lineStyle: {
            color: '#ccc',
            width: 1.5,
            curveness: 0.5
        },

        itemStyle: {
            color: 'lightsteelblue',
            borderColor: '#c23531',
            borderWidth: 1.5
        },

        label: {
            show: true,
            color: '#555'
        },

        leaves: {
            label: {
                show: true
            }
        },

        animationEasing: 'linear',

        animationDuration: 700,

        animationDurationUpdate: 1000
    }
});